All those appearances mean plenty of opportunity to play dress up. Kidman’s style, which centers on form-fitting dresses, elaborate detailing and a hefty dose of glamour, has pretty much come full circle over the years. Her all-black ’90s vibes even made a return appearance on the red carpet just this month at the CMTs.

But what really marks her style evolution? Her hair. It’s been curly and straight, blonde and red, shorter and long, plain and adorned with funky accessories. Kidman’s locks deserve praise all their own.

In honor of the actress’ 50th birthday on June 20, check out some of her best red carpet moments from over the years:

1994

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With Tom Cruise at the 20th Annual People's Choice Awards.

1994

Steve.Granitz via Getty Images

With Tom Cruise.

1995

Steve.Granitz via Getty Images

With Tom Cruise at the "Batman Forever" premiere.

1996

Steve.Granitz/INACTIVE via Getty Images

With Tom Cruise at the 11th Annual American Cinematheque Moving Picture Ball.